盘点高中英语语法复习

　　(1) as 引导的定语从句可置于句首，而which不可。

　　(2) as 代表前面的整个主句并在从句中作主语时，从句中的谓语必须是系动词;若为行为动词，则从句中的关系代词只能用which.。

　　在本题中，prevent由于是行为动词，所以正确选项应为B。

　　As 的用法

　　例1. the same… as;such…as 中的as 是一种固定结构, 和……一样……。

　　I have got into the same trouble as he (has).

　　例2. as可引导非限制性从句，常带有'正如'。

　　As we know, smoking is harmful to one's health.

　　As is know, smoking is harmful to one's health.

　　As是关系代词。例1中的as作know的宾语;例2中，它充当从句的主语，谓语动词know要用被动式。

　　2.35 先行词和关系词二合一

　　1)Whoever spits in public will be punished here.

　　(Whoever 可以用 anyone who 代替)

　　2)The parents will use what they have to send their son to technical school.

　　(what 可以用all that代替)

　　返回顶端〉〉

　　2.36 what/whatever/that...

　　1)Whoever spits in public will be punished here.

　　(Whoever 可以用 anyone who 代替)

　　2)The parents will use what they have to send their son to technical school.

　　(what 可以用all that代替)

　　2.37 关系代词that的用法

　　1)不用that的情况

　　a) 在引导非限定性定语从句时。

　　(错) The tree, that is four hundred years old, is very famous here.

　　b) 介词后不能用。

　　We depend on the land from which we get our food.

　　We depend on the land that/which we get our food from.

　　2) 只能用that作为定语从句的关系代词的情况

　　a) 在there be 句型中，只用that，不用which。

　　b) 在不定代词，如：anything, nothing, the one, all, much, few, any, little等作先行词时，只用that，不用which。

　　c) 先行词有the only, the very修饰时，只用that。

　　d) 先行词为序数词、数词、形容词最高级时，只用that。.

　　e) 先行词既有人，又有物时。

　　举例：

　　All that is needed is a supply of oil.

　　所需的只是供油问题。

　　Finally, the thief handed everything that he had stolen to the police.

　　那贼最终把偷的全部东西交给了警察。

　　中学语法大全 动词不定式

　　目录

　　不定式作宾语 28

　　不定式作补语 28

　　不定式主语 30

　　It's for sb/It's of sb 30

　　不定式作表语 31

　　不定式作定语 31

　　不定式作状语 31

　　用作介词的to 32

　　省to 的动词不定式 32

　　动词不定式的否定式 33

　　不定式特殊句型too…to… 33

　　不定式特殊句型so as to 34

　　不定式特殊句型Why not 34

　　不定式的时态和语态 34

　　动名词与不定式 35

　　2.38 不定式作宾语

　　1) 动词+ 不定式

　　afford aim appear agree arrange ask be decide bother care choose come dare demand desire determine expect elect endeavor hope fail happen help hesitate learn long mean manage offer ought plan prepare pretend promise refuse seem tend wait wish undertake

　　举例：

　　The driver failed to see the other car in time.

　　司机没能及时看见另一辆车。

　　I happen to know the answer to your question.

　　我碰巧知道你那道问题的答案。

　　2)动词+不定式 ; 动词+宾语+不定式

　　ask, beg, choose, expect , hate, help intend like, love, need prefer, prepare, promise, want, wish…

　　I like to keep everything tidy. 我喜欢每件东西都保持整洁。

　　I like you to keep everything tidy. 我喜欢你年使每件东西都保持整洁。

　　I want to speak to Tom. 我想和汤姆谈话。

　　I want you to speak to Tom. 我想让你和汤姆谈话。

　　3) 动词+疑问词+ to

　　decide, know, consider forget, learn, remember, show, understand, see, wonder, hear, find out, explain, tell

　　Please show us how to do that. 请演示给我们如何去做。

　　There are so many kinds of tape-recorders on sale that I can't make up my mind which to buy.有这么多的录音机，我都拿不定主意买哪一种。

　　注意:疑问词带不定式在句中作成分时，谓语动词用单数。